“Our collective ‘degrees of separation’ have shrunk over the past five years,” says Facebook’s data team. “In 2011, researchers at Cornell, the Universita degli Studi di Milano, and Facebook computed the average across the 721 million people using the site then, and found that it was 3.74. Now, with twice as many people using the site, we’ve grown more interconnected, thus shortening the distance between any people in the world.”

To celebrate "Friends Day," the social media channel also created a personalized video tool that allows Facebook users to turn their milestone moments with friends into short videos. These videos are shared to users' profiles and posted on their friends' news feeds.